Air purifier with hinged filter frame

ABSTRACT

The present invention provides an air purifier. The air purifier according to one preferred embodiment, of the present invention may comprise: a housing; a blowing unit installed in the housing so as to draw in external air; and a filter unit having filtering surfaces, through which the air passes and which are disposed in multiple directions, and an air inflow space, which has at least a part thereof surrounded by the filtering surfaces disposed in the multiple directions and into which the air discharged from, the blowing unit flows.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of and claims priority to U.S. patentapplication Ser. No. 17/029,261, filed Sep. 23, 2020, which is acontinuation of U.S. patent application Ser. No. 15/750,876, filed Feb.7, 2018; both '261 and '876 applications are incorporated by referenceherein. The '876 application is the U.S. National Stage entry ofInternational Application Number PCT/KR2016/008690, filed under thePatent Cooperation Treaty having a filing date of Aug. 8, 2016, whichclaims priority to Korean Patent Application Serial Number10-2015-0113769 having a filing date of Aug. 12, 2015, Korean PatentApplication Serial Number 10-2015-0122534 having a filing date of Aug.31, 2015, and Korean Patent Application Serial Number 10-2015-0146484having a filing date of Oct. 21, 2015.

TECHNICAL FIELD

The present disclosure relates to an air purifier, capable ofsimultaneously discharging air, having been purified, in multipledirections, improving diversity in product design, and optimizingoperational performance according to a type or a capacity of a filter.

BACKGROUND ART

An air purifier according to the related art has an air inlet in ahousing forming an outer cover, and has an air purification filter andvarious functional filters in an internal space of the housing. Inaddition, after contaminated indoor air and dust are intaken through theair inlet, contaminants and dust in the air, having been intaken, areremoved, so the air purifier allows indoor air to be purified.

The air purifier is configured to intake air through a blower providedinside a housing. The blower indicates a machine causing air flow, andmay be used to denote an air purifier, an electric fan, or the like, indomestic applications and may be used to denote an air conditioningsystem, various intake and exhaust systems, and the like in industrialapplications.

The blower described above may be classified as an axial flow typeblower, a centrifugal type blower, a mixed flow type blower, and thelike, according to characteristics of flow of air passing through animpeller. In detail, an air purifier having a centrifugal type blower,widely used in domestic applications, thereamong, may be divided into asingle suction structure in which suction flow occurs on one side of arotating shaft, and a double suction, structure in which suction flowoccurs oil both sides of a rotating shaft.

The air purifier having a double suction structure has an air inlet oneach of both sides of a housing, and has the advantage in which airintaken through the air inlet is purified and discharged in multipledirections, so an sir purification efficiency is high, as compared to asingle suction structure.

A filter of the air purifier described above is generally disposed oneach of both sides of a housing in consideration of air flow. In otherwords, as a filter is disposed on each of both sides of a housing tocorrespond to an air inlet installed on each of both sides of thehousing, the overall design type of product is a cube type.

Therefore, it is difficult to apply various designs to an air purifier,so that a design of a product may be limited.

In addition, in order to allow for various product designs, a type or acapacity of a filter may be changed. Moreover, even when a design isfixed, a case in which a type or a capacity of a filter is changed mayoccur.

In this case, the air purifier may have different durability or airpurification performance of a filter thereof, according to a type or acapacity of the filter, having been mounted.

However, an air purifier according to the related art is configured tobe operated according to a control setting value fixed in manufacturingor in initial setting, so that it may be difficult to operate an airpurifier while a performance thereof is optimized, according to a filtermounted on the air purifier.

DISCLOSURE Technical Problem

An aspect of the present disclosure may provide an air purifier to whichvarious designs are applied.

An aspect of the present disclosure may increase air purificationefficiency by providing a flow path optimized in a housing.

An aspect of the present disclosure may optimize operational performanceaccording to a type or a capacity of a filter mounted on an airpurifier.

An aspect of the present disclosure may provide a shape variable typefilter frame, allowing a multidirectional air discharge structure of anair purifier to be implemented using a plate-shaped filter according tothe related art.

Technical Solution

According to an aspect of the present disclosure, an air purifierincludes: a housing; a blowing unit installed in the housing to intakeexternal air; and a filter unit having a plurality of filteringsurfaces, through which the air passes and which are disposed inmultiple directions, and an air inflow space, at least a part of whichis surrounded by the filtering surfaces disposed in the multipledirections and into which the air discharged from the blowing unitflows.

In an exemplary embodiment, the filter unit may have a filter member, abody of which is bent or curved to allow the filtering surfaces to bedisposed in multiple directions.

In another exemplary embodiment, the filter unit may include: aplurality of filter members; and a shape variable type filter frame onwhich the filter members are mounted, and which is deformed to allow theplurality of filter members to be disposed in multiple directionsdifferent from each other.

For example, the shape variable type filter frame may include: a firsttype frame on which the filter members are mounted; and a second typeframe on which the filter members are mounted, and which ishinge-combined with one side of the first type frame to be rotated.

The air purifier according to an exemplary embodiment may furtherinclude: a filter recognition part for recognizing the filter unit; anda control part for setting a control setting value according to arecognition result by the filter recognition part, and controlling theblowing unit to perform an air purification operation according to thecontrol setting value.

Advantageous Effects

According to an exemplary embodiment in the present disclosure, a heightand a shape of a filter may be changed, so a form of an outer cover ofan air purifier may be changed to correspond to the filter. Thus, adesign of an air purifier may be variously implemented.

According to an exemplary embodiment in the present disclosure, as aheight of a filter may be increased or a shape may be changed inside anair purifier, air purification efficiency may be significantlyincreased. Thus, using the same filter, an air purifier may beimplemented to have various sizes.

According to an exemplary embodiment in the present disclosure, a framesupporting a filter may be deformed to have various forms, and thus, maybe applied to various air suction structures and air dischargestructures.

According to an exemplary embodiment in the present disclosure, thenumber of filters mounted on an air purifier, a type, or a capacity maybe automatically recognized, and a control setting value of an airpurifier may be set differently according to a recognition result, so aperformance of an air purifier may be optimized.

DESCRIPTION OF DRAWINGS

FIG. 1 is a side cross-sectional view of an air purifier according to anexemplary embodiment;

FIG. 2 is a perspective view of a second housing cover of an airpurifier according to an exemplary embodiment;

FIG. 3 is a cross-sectional view taken along line A-A′ of FIG. 2 ;

FIG. 4 is a cross-sectional view taken along line B-B′ of FIG. 2 ;

FIG. 5 is a combination state diagram of an air purifier according to anexemplary embodiment;

FIG. 6 is a perspective view of an air purifier according to anotherexemplary embodiment;

FIG. 7 is a side cross-sectional view of an air purifier according toanother exemplary embodiment;

FIG. 8 is a perspective view of an air purifier according to anotherexemplary embodiment;

FIG. 9 is a perspective view of a filter holder included in an airpurifier according to another exemplary embodiment;

FIG. 10 is a combination state diagram of an air purifier according toanother exemplary embodiment;

FIG. 11 is a perspective view of a shape variable type filter frameaccording to an exemplary embodiment;

FIG. 12 is a bottom, view of the shape variable type filter frameillustrated in FIG. 11 ;

FIG. 13 is a perspective view illustrating a state in which the shapevariable type filter frame illustrated in FIG. 11 forms a structure inthe form of a double overlapped frame;

FIG. 14 is an exploded perspective view of the shape variable typefilter frame illustrated in FIG. 11 ;

FIG. 15 is an operation state diagram illustrating a deformationoperation of the shape variable type filter frame illustrated, in FIG.11 ;

FIGS. 16 and 17 are perspective views illustrating an exemplaryembodiment in which the shape variable type filter frame illustrated inFIG. 11 is applied to an air purifier having a multidirectionaldischarge structure;

FIGS. 18 and 19 are perspective views illustrating an exemplaryembodiment in which the shape variable type filter frame illustrated inFIG. 11 is applied to an air purifier having a unidirectional dischargestructure; and

FIG. 20 is a diagram of an air purifier according to exemplaryembodiments.

BEST MODE FOR INVENTION

In order to facilitate an understanding of the description of theexemplary embodiment of the present invention, the same referencenumerals are used for the same elements in the accompanying drawings,and related elements among elements performing the same function in eachexemplary embodiment are denoted by the same number or the number ofextension.

Further, in order to clarify the gist of the present invention, adescription of elements and techniques well known in the prior art willbe omitted, and the present invention will be described in detail withreference to the accompanying drawings.

It is to be understood, however, that the spirit and scope of thepresent invention are not limited to the exemplary embodimentsillustrated, but other forms may be suggested by those skilled in theart while specific components are added, changed, and deleted, whichalso included within the scope of the same idea as the presentinvention.

First, an air purifier according to the present invention may beconfigured to include a housing, a blowing unit installed in the housingto intake external air, and a filter unit installed in the housing anddischarging air, having been purified, simultaneously in multipledirections.

Hereinafter, an air purifier according to the present invention will bedescribed in detail.

First, in FIG. 1 , an air purifier 100 according to a preferredexemplary embodiment is illustrated. The air purifier 100 according tothe present invention may include a housing forming an outer cover. Inthis case, the housing may be provided to be divided into a firsthousing cover 111 and a second housing cover 112, and the first housingcover 111 and the second housing cover 112 may be combined to form asingle housing.

As described above, the housing is provided as a divided type, so thehousing is provided to be separated or combined. In this case, a varietyof designs may be applied thereto, and internal components may be easilycleaned, convenience in use may be increased.

For example, the housing is provided to be divided, into the firsthousing cover ill and the second housing cover 112, a blowing unit 120intaking external air is installed inside the first housing cover, and afilter unit 130 purifying air supplied from the blowing unit may beinstalled inside the second housing cover.

In this case, even when the first housing cover 111 and the blowing unit120 installed inside the first housing cover are not changed, a heightof the filter unit 130 installed inside the second housing cover 112 mayonly increase or decrease, so a design of an air purifier may be moreeasily changed.

In this case, when the blowing unit 120, intaking and discharging air,is provided in the same manner while a height of the filter unit 130increases, purification capacity of an air purifier is improved, so anair purifier has the advantage in which the air purifier may be appliedto a wider area.

In addition, as described later, when the filter unit 130 includes atleast one bent portion, the filter unit 130 may be provided to havevarious shapes such as a circle, a rectangle, an ellipse, and the like,so a design of a second housing cover is also provided to be circular,rectangular, elliptical, and the like, corresponding to the shape of thefilter unit 130. Thus, a variety of designs may be applied to an outercover of an air purifier.

Meanwhile, in the first housing cover 111 forming a lower portion of ahousing, an air inlet 111 a in communication with an exterior forintaking air is provided in plural. Moreover, inside the first housingcover, a blowing fan 121, intaking and discharging air, is provided asthe blowing unit 120.

In an exemplary embodiment, the air inlet 111 a may be provided in eachof both surfaces of the first, housing cover 111, and the blowing unit120 may intake air on both surfaces of the first housing cover 111through the air inlet 111 a on each of both sides. As an exampletherefor, the blowing unit 120 may be provided as a single doublesuction centrifugal fan, but is not limited thereto. Alternatively, theblowing unit may be provided as two independent single suctioncentrifugal fans. In addition, a prefilter (not shown) for primarilyfiltering foreign materials included in air intaken through the airinlet 111 a, in detail, a large foreign material, may be mounted in thefirst housing cover. By means of the prefilter configured, as describedabove, foreign materials may be prevented from being accumulated in aninternal component such as the blowing unit 120, a motor (not shown),and the like provided inside an air purifier, the air purifier has theeffect in which the service life of internal components may be extended.

In addition, as illustrated, in FIG. 1 , when a filter member 131, whichwill be described later, is disposed in an upper portion of the blowingunit 120, a height of the filter member 131 may easily increase asneeded, so the air purifier has the effect in which a performance of anair purifier may be increased.

Meanwhile, in the second housing cover 112 connected to am upper portionof the first housing cover 111, an air discharge part 113 incommunication to an exterior for discharging air is provided in plural.Moreover, the filter member 131 is provided inside the first housingcover.

The filter member 131 may purify air discharged to the air dischargepart 113 after flowing into a housing.

In the present invention, in the filter member 131, filtering surfaces132 a, 132 b, 132 c, and 132 d, through which air passes, are disposedin multiple directions, and an air inflow space 132 e, at least aportion of which is surrounded by the filtering surfaces 132 a, 132 b,132 c, and 132 d disposed in multiple directions, may be provided.

The filter member 131 may be configured to have a closed cross-sectionalstructure in which both ends are connected to each other and four sidesof the air inflow space 132 e are surrounded by the filtering surfaces132 a, 132 b, 132 c, and 132 d, and may be configured to have an opencross-sectional structure in which both ends are separated and a portionof the air inflow space 132 e is only surrounded by the filteringsurfaces.

In an exemplary embodiment, the filter member 131 may include aplurality of filtering surfaces 132 a, 132 b, 132 c, and 132 d, disposedin different directions, and thus may be configured in the form of arectangular pipe as illustrated in FIG. 1 , or in the form of apolygonal pipe. In addition, the filter member 131 may be configured inthe form of a cylinder.

The filter member 131 according to the present invention may include aplurality of filtering surfaces 132 a, 132 b, 132 c, and 132 d, and mayinclude the air inflow space 132 e formed by the filtering surfaces 132a, 132 b, 132 c, and 132 d. As an example, when the filter member 131 isprovided in the polygonal form, the filter member may be formed of theplurality of filtering surfaces 132 a, 132 b, 132 c, and 132 d. In otherwords, a first filtering surface 132 a, a second filtering surface 132b, a third filtering surface 132 c, and a fourth filtering surface 132 dmay be included therein, and the air inflow space 132 e formed by thefiltering surfaces 132 a, 132 b, 132 c, and 132 d may be includedtherein. However, the filter member 131 may have not only a polygonalcross-section but also a circular cross-section as long as a closedcross-section is formed.

Here, the first filtering surface 132 a, the second filtering surface132 b, the third filtering surface 132 c, and the fourth filteringsurface 132 d may be provided by bending a single integrated filter, ormay be provided by combining different filters. In addition, each of thefiltering surfaces 132 a, 132 b, 132 c, and 132 d may be formed ofdifferent types of filter, and may be formed of the same type of filter,which may be suitably selected by those skilled in the art.

Meanwhile, air, supplied from the blowing fan 121, may flow in to theair inflow space 132 e of the filter member 131, and the air, flowingin, may pass through the filter member 131 and may be supplied to anexterior through the air discharge part 113. In this case, the airdischarge part 113 is provided in a surface corresponding to each of thefiltering surfaces 132 a, 132 b, 132 c, and 132 d of the filter member131, so air, filtered by the filter member 131, is allowed to besupplied to an exterior.

Meanwhile, according to a preferred exemplary embodiment, the secondhousing cover 112, covering an upper portion of the first housing cover111, may be provided as illustrated in FIG. 2 . In other words, in aninternal surface of the second housing cover 112, a flow path switchingmember 114, protruding into the air inflow space 132 e and guiding airflowing into the air inflow space 132 e to the filtering surfaces 132 a,132 b, 132 c, and 132 d, is provided.

The flow path switching member 114 may be fixed to the second housingcover 112 through various combining members 114 a such as a pin, a bolt,and the like, and flow of air, having been purified, is induced by theflow path switching member 114 to the air discharge part 113, so air maysmoothly flow and air, having been purified, may be easily discharged.

In FIGS. 3 and 4 , a longitudinal section and a transverse section ofthe second housing cover 112 are illustrated. Referring to this, theflow path switching member 114 has a cross section narrowing downwardly,and an edge is curved to be concave inwardly of the second housing cover112.

The flow path switching member 114 formed as described above may bedisposed in the air inflow space 132 e of the filter member 131 asillustrated in FIG. 5 , which is possible by combining the secondhousing cover 112 with an upper portion of the first housing cover 111.

Moreover, the air discharge part 113 corresponding to each of fourfiltering surfaces 132 a, 132 b, 132 c, and 132 d of the filter member131 may be formed in a side surface of the second housing cover 112. Inthis case, each air discharge part 113 may be formed in a surfaceopposing each of the filtering surfaces 132 a, 132 b, 132 c, and 132 dof the filter member 131.

Here, when the flow path switching member 114 is combined with an upperportion of the filter member 131, a flow path of air may be switched,and air may smoothly flow. Thus, air may be smoothly discharged throughfour air discharge parts, formed in a side surface of the second housingcover 112.

Meanwhile, in FIG. 6 , an air purifier 100 according to anotherexemplary embodiment is illustrated.

The air purifier 100 according to another exemplary embodiment mayinclude a first housing cover 111 having a blowing fan 121 therein, anda second housing cover 112 combined with an upper portion of the firsthousing cover. Moreover, an outer cover of the air purifier may beformed by the first housing cover and the second housing cover.

In this case, the air discharge part 116 provided in the second housingcover 112 is formed along an edge 115 of the second housing cover 112.Referring to FIG. 7 , to illustrate this in more detail, in a firstfiltering surface 132 a and a third filtering surface 132 c of thefilter member 131, or in an upper portion of at least one among a firstfiltering surface 132 a, a second filtering surface 132 b, a thirdfiltering surface 132 c, and a fourth filtering surface 132 d, a closingcover is installed therein.

The closing cover according to a preferred exemplary embodiment mayinclude a support frame 141, and a plurality of partition wails 142installed in the support frame 141. Thus, the support frame 141, closingan upper portion of the air inflow space 132 e of the filter member 131,may be installed in an upper portion of the filtering surfaces 132 a,132 b, 132 c, and 132 d of at least one of filter members 131.

Moreover, the plurality of partition wails 142 are combined with anupper portion of the support frame 141, and the partition walls may beextended toward an internal surface of the second housing cover 112. Inthis case, an upper portion of the air inflow space 132 e of the filtermember 131 is closed by the support frame 141, and a hollow portion 143formed by means of the partition wall 142 may be provided in an upperportion of the support frame 141.

Moreover, the second housing cover 112 is provided while surfacescorresponding to the air inflow space 132 e and the hollow portion 143are closed. In addition, an edge portion thereof is open and is providedas the air discharge part 116. Thus, air passing through the filtermember 131 and being purified is discharged through the air dischargepart 116 formed in the edge portion of the second housing cover 112, andthe air discharge part 116 is formed in each of four edges of the secondhousing cover 112. Thus, air, having been purified, is able to bedischarged in four directions, so the air purification time may beshortened.

Meanwhile, in FIG. 8 , an air purifier 100 according to anotherexemplary embodiment is illustrated therein. According to this, an airdischarge part 113 discharging air having been purified is formed infour side surfaces of a second housing cover 112, and an upper airdischarge part 117 discharging air having been purified is formed in anupper surface of the second housing cover 112.

In this case, the upper air discharge part 117 is formed in the uppersurface of the second housing cover 112, and may be formed in a regioncorresponding to the air inflow space 132 e of the filter member 131,described previously. In other words, an upper filter member 152 (forexample, a HEPA filter) to be described later may be provided in anupper portion of the air inflow space 132 e of the filter member 131.

To this end, a filter holder 150 illustrated in FIG. 9 may be provided.The filter holder 150 has the form of a frame, and a through part 151corresponding to the air inflow space 132 e of the filter member 131 maybe provided in the center thereof.

In FIG. 10 , a combination state of the filter holder 150 is illustratedtherein. The filter holder 150 is installed in an upper portion of thefilter member 131, and the through part 151 of the filter holder 150 isallowed to oppose the air inflow space 132 e of the filter member 131.

Moreover, the upper filter member 152 may be inserted into the throughpart 151 of the filter holder 150. In this case, preferably, the upperfilter member 152 may be a HEPA filter, but is not limited by thepresent invention.

As described above, when the upper filter member 152 is included, air isable to be discharged to an upper portion in addition to the airdischarge part 113 formed in a side surface of the second housing cover112, so air purification efficiency may be further increased.

Meanwhile, in FIGS. 11 through 19 , a shape variable type filter frame200 according to an exemplary embodiment is illustrated therein.

In the shape variable type filter frame 200 according to an exemplaryembodiment, a plate-shaped filter according to the related art is used,so a multidirectional air discharge structure of the air purifier 100,described previously referring to FIGS. 1 through 10 , may beimplemented.

In other words, in the shape variable type filter frame 200, accordingto art exemplary embodiment, a plurality of plate-shaped filters areused, so filtering surfaces are disposed in multiple directions, and afilter unit having an air inflow space, at least a portion of which issurrounded, by the filtering surfaces disposed in multiple directions,may be implemented.

Hereinafter, referring to FIGS. 11 through 19 , the shape variable typefilter frame 200 according to an exemplary embodiment will be described.

As illustrated in FIGS. 11 through 13 , the shape variable type filterframe 200 according to an exemplary embodiment is a structure on which aplurality of filter members 231 are mounted, and each of the pluralityof filter members 231, having been deformed, may be disposed in multipledirections different from each other.

In other words, in the shape variable type filter frame 200 according toan exemplary embodiment illustrated in FIGS. 11 through 19 , while thefilter member 231 itself is not bent or curved, the plate-shaped filtermember 231 according to the related art is used as the filter member 231and the shape variable type filter frame 200 on which the filter member231 is mounted is deformed. As a result, a structure in which filteringsurfaces are disposed in multiple directions may be implemented.

In order to implement the form described above, a plurality ofplate-shaped filter members 231 may be mounted on the shape variabletype filter frame 200. In addition, the shape variable type filter frame200 is deformed, so the plurality of plate-shaped filter members 231 mayfoe disposed while forming a predetermined angle with respect to eachother.

Here, the plurality of filter members 231 mounted on the shape variabletype filter frame 200 may be the same type of filter, or may be adifferent types of filter performing different functions.

For example, as the filter member 231, various types of filters, such asa prefilter, a functional filter, a High Efficiency Particulate Air(HEPA) filter, a deodorizing filter, and the like may be employed.

Here, the prefilter is provided for removing relatively large dust,hair, pet hair, and the like, the functional filter is provided forantibacterial properties and for removing pollen, house dust mites,germs, bacteria, and the like, the HEPA filter is provided for removingfine dust, various organisms such as indoor mold, spores, and thedeodorizing filter is provided for removing indoor odors and harmfulgas.

Further, the filter member 231 mounted on the shape variable type filterframe 200 is not limited to an air purification filter, and may beprovided as a humidification filter or a dehumidification filterdepending on usage.

Meanwhile, as a specific example for implementing a deferrableconfiguration as described previously, the shape variable type filterframe 200 may include a first type frame 210 and a second type frame220, and the first type frame 210 and the second type frame 220 may befolded to form various types of frame structures.

The first type frame 210 may be configured in the form of a frame toallow an edge of the filter member 231 to be mounted thereon.

In an exemplary embodiment, a regular position guide part 212 may beprovided on an upper end of the first type frame 210.

For example, the regular position guide part 212 may be configured inthe form of a protrusion protruding from the upper end of the first typeframe 210 as illustrated in FIG. 11 , and a fastening groove 213 inwhich the regular position guide part 212 in the form of a protrusion isto be inserted and fastened may be provided in a lower end of the firsttype frame 210 as illustrated in FIG. 12 , but is not limited thereto.Alternatively, the regular position guide part 212 may be configured inthe form of a rib or a hook, supporting an outer portion of the firsttype frame 210 stacked on an upper end thereof.

In addition, in an exemplary embodiment, a filter separation preventionrib 215 protruding along an inner edge may be provided inside the firsttype frame 210. The filter separation prevention rib 215 may serve as astopper for holding a position of the filter member 231 mounted on thefirst type frame 210.

The second type frame 220 may also be configured in the form of a frameto allow an edge of the filter member 231 to be mounted thereron, in thesame manner as the first type frame 210.

In addition, the second type frame 220 may be hinge-combined with oneside of the first type frame 210 to be rotated. In an exemplaryembodiment, the second type frame 220 may be hinge-combined with thefirst type frame 210 to be rotated backwards and forwards of the firsttype frame 210.

The second type frame 220 may rotate with respect to the first typeframe 210 and may form a structure bent at various angles. For example,when the second, type frame 220 is disposed at 90 degrees with respectto the first type frame 210, an L-shaped structure may be formed withthe first type frame 210. Moreover, when the second type frame isdisposed at 0 degree or 180 degrees with respect to the first type frame210, a plate-shaped structure, overlapped or arranged in a row, may beformed.

In addition, in an exemplary embodiment, in the second type frame 220,in the same manner as the first type frame 210, a regular position guidepart 222, a filter separation prevention rib 225, and a fastening groove223 may be included therein.

Meanwhile, in an exemplary embodiment, the shape variable type filterframe 200 may be configured to include a plurality of first type frames210 and a plurality the second type frames 220. Moreover, as the firsttype frame 210 and the second type frame 220 are alternately connectedto each other, according to a rotation angle of each of the first typeframe 210 and the second type frame 220, a structure in the form of apolygonal ring or a structure in the form of a double overlapped, framemay be configured.

For reference, the structure in the form of a polygonal ring indicates astructure in which the first type frame 210 and the second type frame220 are separated from each other and the air inflow space 132 e isformed in the center as illustrated in FIG. 11 , and the structure inthe form of a double overlapped frame indicates a structure in whichportions of the first type frame 210 and the second type frame 220overlap each other and the entirety thereof forms a plate-shape asillustrated in FIG. 13 .

Here, when the first type frame 210 and the second type frame 220 formthe structure in the form of a double overlapped frame, the plurality offilter members 231 may be disposed in the same direction.

Hereinafter, as illustrated in FIGS. 11 through 15 , shape variable typefilter frames 210 and 220, including two first type frames 210 and twosecond type frames 220, will be described in detail.

In an exemplary embodiment, the two first type frames 210 and the twosecond type frames 220 may be alternately connected to each other andmay form a rectangular ring shaped structure.

Here, the two first type frames 210 and the two second type frames 220may be rotationally symmetrically arranged with respect to the center ofthe rectangular ring shaped structure formed thereby.

In addition, the filter frames 210 and 220 may form a structure in theform of a double overlapped frame, as the second type frame 220 combinedwith one side of the first type frame 210 is disposed at 180 degrees andthe second type frame 220 combined with the other side of the first typeframe 210 is disposed at 0 degree as illustrated in FIG. 13 .

To this end, in an exemplary embodiment, the second type frame 220combined with one side of the first type frame 210 is configured torotate within a range of a rotation angle of 90 degrees to 180 degreeswith respect to the first type frame 210.

In addition, the second type frame 220 combined with the other side ofthe first type frame 210 is configured to rotate within a range of arotation angle of 0 degree to 90 degrees with respect to the first typeframe 210.

In an exemplary embodiment, the first type frame 210 and the second typeframe 220 may have outer hinge-combining parts 217 and 227 in one side,and may have inner hinge-combining parts 218 and 228 in the other side.

Here, the outer hinge-combining part 217 of the first type frame 210 maybe combined with the outer hinge-combining part 227 of the second typeframe 220, and the inner hinge-combining part 218 of the first typeframe may be combined with the inner hinge-combining part 228 of thesecond type frame 220.

In addition, the outer hinge-combining parts 217 and 227 are locatedoutside a connection portion of the first type frame 210 and the secondtype frame 220, and the inner hinge-combining parts 218 and 228 arelocated inside a connection portion of the first type frame 210 and thesecond type frame 220, as illustrated in FIG. 12 .

The outer hinge-combining parts 217 and 227 may allow the first typeframe 210 and the second type frame 220 to be hinge-combined so as to berotated at an angle at which the first type frame 210 and the secondtype frame 220 are allowed to overlap each other.

In addition, the inner hinge-combining parts 218 and 228 may allow thefirst type frame 210 and the second type frame 220 to be hinge-combinedso as to be rotated at an angle at which the first type frame 210 andthe second type frame 220 are allowed to be arranged in a row.

In this regard, two first type frames 210 and two second type frames 220are rotated with respect to an adjacent frame and form a structure inthe form of a double overlapped frame as illustrated in FIG. 15 .

Meanwhile, in an exemplary embodiment, a first sealing part 219protruding from each of both sides of the first type frame 210 may beprovided therein.

In addition, a second sealing part 229 to be in airtight contact withthe first sealing part 219 may be provided on each of both sides of thesecond type frame 220.

The first sealing part 219 and the second sealing part 229 are incontact with each other when the first type frame 210 and the secondtype frame 220 are disposed to form a predetermined angle, and thus mayallow a connection portion of the first type frame 210 and the secondtype frame 220 to be sealed so as to prevent air from being leaked outfrom the connection portion of the first type frame 210 and the secondtype frame 220.

In addition, the first sealing part 219 and the second sealing part 229may perform a function of a stopper limiting a rotation angle betweenthe first type frame 210 and the second type frame 220, in addition to afunction of sealing the connection portion of the first type frame 210and the second type frame 220 as described previously.

Moreover, the first sealing part 219 and the second sealing part 229 mayperform a function of resisting air flow to maintain the form of apolygonal ring when air is discharged from an inside to an outside ofthe filter frames 210 and 220 forming the form of a polygonal ring. Inother words, when the first type frame 210 and the second type frame 220receive wind pressure from the inside to the outside, the first sealingpart 219 and the second sealing part 229 are in contact with each otherand may resist wind pressure.

In an exemplary embodiment, the first sealing part 219 and the secondsealing part 229 may be in airtight contact with each other when aplurality of first type frames 210 and a plurality of second type frames220 configure the form of a polygonal ring.

For example, the first sealing part 219 may be configured in the form ofa plate extended to be inclined on each of both sides of the first typeframe 210, and the second sealing part 229 may be configured in the formof a plate extended to be inclined on each of both sides of the secondtype frame 220 to correspond to the first sealing part 219. In thiscase, when the first sealing part 219 and the second sealing part 229are in surface contact with each other to secure airtightness when thefirst type frame 210 and the second type frame 220 rotate and aredisposed at a predetermined angle.

However, the first sealing part 219 and the second sealing part 229 arenot limited to a structure securing airtightness by means of surfacecontact, and may be configured to have any structure capable ofpreventing air from being leaked out from the connection portion of thefirst type frame 210 and the second type frame 220.

Meanwhile, in FIGS. 16 through 19 , an exemplary embodiment in which theshape variable type filter frame 200 is applied to an air purifier isillustrated therein.

First, in FIGS. 16 and 17 , an exemplary embodiment in which the shapevariable type filter frame 200 is applied to the air purifier 100 havinga multidirectional discharge structure according to an exemplaryembodiment is illustrated therein.

As illustrated in FIGS. 16 and 17 , in the air purifier 100 having amultidirectional discharge structure, an air inlet 111 a is provided inone side of a first housing cover 111, and an air discharge part 113 isprovided in four sides of the second housing cover 112.

When the shape variable type filter frame 200 is applied to the airpurifier 100 having a multidirectional discharge structure, the shapevariable type filter frame 200 may be mounted in the form of a polygonalring to correspond to the air discharge part 113 provided in four sidesas illustrated in FIGS. 16 and 17 . In this case, air, flowing into thesecond housing cover 112 inside the first housing cover 111, flowsinside the shape variable type filter frame 200, passes through thefilter member 231 mounted on each of the first type frame 210 and thesecond type frame 220, and is then discharged indoors through the airdischarge part 113.

Meanwhile, in FIGS. 18 and 19 , an exemplary embodiment in which theshape variable type filter frame 200 is applied to an air purifierhaving a unidirectional discharge structure is illustrated therein.

As illustrated in FIGS. 18 and 19 , in an air purifier having aunidirectional discharge structure, an air inlet 111 a is provided inone side of a first housing cover 111, and a single air discharge part113 is provided in an upper end or the other side of the first housingcover 111.

When the shape variable type filter frame 200 is applied to an airpurifier having a unidirectional discharge structure, the shape variabletype filter frame 200 may be mounted in the form of a double overlappedframe to correspond to the air inlet 111 a as illustrated in FIGS. 18and 19 . In this case, air, intaken through the air inlet 111 a, passesthrough the filter member 231 mounted on each of the first type frame210 and the second type frame 220, and is then discharged through theair discharge part 113.

In addition, in a structure in which the shape variable type filterframe 200 configures the form of a double overlapped frame, filtermembers 231 mounted on the first type frame 210 and the second typeframe 220 have a double overlapped form, so air may be filtered in twostages.

The shape variable type filter frame 200 according to an exemplaryembodiment, as described previously may be deformed in various shapes,and thus has the advantage in which the shape variable type filter framemay be flexibly applied to various air intaking structures and airdischarging structures of an air purifier.

In addition, the shape variable type filter frame 200 has a reducedvolume by means of deformation, and thus has the advantage in which theshape variable type filter frame may foe easily transported and stored.

Next, referring to FIG. 20 , a filter specification automaticrecognition function of the air purifier 100 according to exemplaryembodiments and an automatic operation control function according to afilter specification will be described.

Referring to FIG. 20 , the air purifier 100 according to exemplaryembodiments may include a filter recognition part 160, a control part170, a storage part 180, and a display part 190.

The filter recognition part 160 is provided to recognize a type or acapacity of filter members 131 and 231, forming filter units 130 and200.

For example, in the filter members 131 and 231, an identification part(for example, an identification tag, a unique protrusion, apredetermined color, or the like), capable of identifying a type thereofis provided therein, and the filter recognition part 160 may identify atype of the filter members 131 and 231 using a means (for example, a tagrecognition means, a protrusion sensing means, a color recognitionmeans, or the like) for recognizing the identification part provided inthe filter members 131 and 231.

For another example, the filter recognition part 160 may recognize thenumber, an area, a height, a depth, and the like of the filter members131 and 231 are recognized through various sensors (for example, amagnetic sensor, or the like), so a capacity of the filter members 131and 231 may be identified.

Here, the number of the filter members 131 and 231 indicates the numberof the filter units 130 and 200 staked, when a plurality of filter units130 and 200, described previously with reference to FIGS. 1 through 13are staked in a height direction of the air purifier 100 and installed.

Additionally, the filter recognition part 160 may recognize that thefilter members 131 and 231 are not properly mounted on the air purifier100 when a type or a capacity of the filter members 131 and 231 is notidentified, as described previously.

The control part 170 is provided for controlling an operation of the airpurifier 100, and may be implemented as a processor, for example, acentral processing unit (CPU), a graphics processing unit (GPU), amicroprocessor, an application specific integrated, circuit (ASIC), afield programmable gate array (FPGA), and the like.

In detail, the control part 170 may differently set a control settingvalue for an operation of the air purifier 100 depending on a type or acapacity of the filter members 131 and 231, recognized by the filterrecognition part 160, when the filter members 131 and 231 are mounted onthe air purifier 100. Here, the control setting value for an operationof the air purifier 100 may include a rotation speed default value of amotor of the blowing unit 120 (for example, a rotation speed settingvalue for each blowing step, a minimum or maximum rotation speed settingvalue, and the like), a reference value for replacement cycledetermination of a filter (for example, the use time, a flow rate, andthe like), and the like.

In addition, the control part 170 may be controlled to operate apurification function of the air purifier 100, a filter replacementcycle determination and alarm function, and the like, according to thecontrol setting value differently set depending on a type or a capacityof the filter members 131 and 231. The functions of the air purifier 100described above are well known to those skilled in the art, so adetailed description thereof will be omitted.

The storage part 180 is provided for storing information necessary forcontrol setting of the air purifier 100, and may be provided as, forexample, a nonvolatile memory (for example, a read-only memory (ROM), aflash memory, and the like).

For example, the storage part 180 may set information on a controlsetting value differently set, depending on a type or a capacity of thefilter members 131 and 231.

The display part 190 may be provided for displaying operation-relatedinformation of the air purifier 100 according to control of the controlpart 170 and providing the operation-related information to a user, andmaybe provided as, for example, an LED panel, a touchscreen, and thelike.

For example, the display part 190 may display information on the type orthe capacity of the filter members 131 and 231, recognized by the filterrecognition part 160.

For another example, the display part 190 may provide a user with filterabnormally mounted alarm information through a display when a filter,having not been properly mounted, is recognized by the filterrecognition part 160.

The air purifier 100 capable of recognizing a filter specification asdescribed above may automatically recognize a type or a capacity of thefilter members 131 and 231, having been installed, and may differentlyset a control setting value of the air purifier 100 according to arecognition result, so a performance of the air purifier 100 may beoptimized.

In addition, the air purifier 100 does not require a separate operationor a manual setting for control setting of the air purifier 100, andthus may be more conveniently used.

While the present, disclosure has been shown and described withreference to exemplary embodiments thereof in particular, the presentdisclosure is not limited thereto. It will be readily apparent to thoseskilled in the art that various changes and modifications thereof may bemade within the spirit and scope of the present disclosure, andtherefore to be understood that such changes and modifications belong tothe scope of the appended claims.

The invention claimed is:
 1. A filter unit, comprising: a filter frame;and a filter member mounted on the filter frame, the filter memberhaving four filtering surfaces to filter air, wherein the filter frameincludes: a first frame; a second frame of which one side is rotatablyconnected to one side of the first frame; a third frame of which oneside is rotatably connected to other side of the first frame; and afourth frame of which one side is rotatably connected to other side ofthe second frame, and of which other side is hinge-combined with otherside of the third frame, wherein when an angle between the first frameand the second frame increases and an angle between the third frame andthe fourth frame increases, an angle between the first frame and thirdframe decreases and an angle between the second frame and the fourthframe decreases, and wherein when the angle between the first frame andthe second frame decreases and the angle between the third frame and thefourth frame decreases, the angle between the first frame and thirdframe increases and the angle between the second frame and the fourthframe increases.
 2. The filter unit of claim 1, wherein when the secondframe rotates between an upper limit and a lower limit of a first rangeof a rotation angle with respect to the first frame, the third framerotates between an upper limit and a lower limit of a second range of arotation angle with respect to the first frame, wherein when the secondframe rotates between the upper limit and the lower limit of the secondrange of a rotation angle with respect to the fourth frame, the thirdframe rotates between the upper limit and the lower limit of the firstrange of a rotation angle with respect to the fourth frame, wherein thelower limit of the first range is 0 degree, the upper limit of the firstrange is 90 degrees, the lower limit of the second range is 90 degrees,and the upper limit of the second range is 180 degrees.
 3. The filterunit of claim 1, wherein when the angle between the first frame and thesecond frame is 0 degree and the angle between the first frame and thethird frame is 180 degrees, the first frame and the second frame are incontact with each other and the third frame and the fourth frame are incontact with each other.
 4. The filter unit of claim 1, wherein when theangle between the first frame and the second frame is 90 degrees and theangle between the first frame and the third frame is 90 degrees, thefilter frame forms a rectangle.
 5. The filter unit of claim 1, whereinthe first frame and the fourth frame are parallel to each other and thesecond frame and the third frame are parallel to each other.
 6. Thefilter unit of claim 1, wherein the angle between the first frame andthe second frame is the same as the angle between the third frame andthe fourth frame and the angle between the first frame and the thirdframe is the same as the angle between the second frame and the fourthframe.
 7. The filter unit of claim 1, wherein the sum of the anglebetween the first frame and the second frame and the angle between thefirst frame and the third frame is 180 degrees.
 8. The filter unit ofclaim 1, wherein the first frame and the fourth frame are a first typeframe and the second frame and the third frame are a second type frame.9. The filter unit of claim 1, wherein the filter member includes: afirst filter member mounted on the first frame, a second filter membermounted on the second frame, a third filter member mounted on the thirdframe, and a fourth filter member mounted on the fourth frame.
 10. Thefilter unit of claim 9, wherein each of the first frame, the secondframe, the third frame, and the fourth frame is configured in the formof a frame surrounding each of the first filter member, the secondfilter member, the third filter member, and the fourth filter member.